If you read the log, you would see

> sys:1: RuntimeWarning: not adding directory '' to sys.path
> since it's writable by an untrusted group.
> Untrusted users could put files in this directory which might
> then be imported by your Python code. As a general precaution
> from similar exploits, you should not execute Python code from
> this directory yes

In other words: the directory in which you compile must be owned by a
standard linux user (i.e. not root) and with no fancy authorizations
(e.g. rwxr-xr-x is fine). Then you should not compile as a root but as
this standard user.

Vincent

2014-12-15 17:23 UTC+01:00, Soomin Jeon <soomin.jeo...@gmail.com>:
> Uhm, actually I faced another problems.....
> (I posted a note about the same problem on the sage-devel corner because
> they say they want to know all problems)
>
> ************************************************************************
> Error installing package pynac-0.3.2
> ************************************************************************
> Please email sage-devel (http://groups.google.com/group/sage-devel)
> explaining the problem and including the relevant part of the log file
>   /usr/local/sage-6.4.1/logs/pkgs/pynac-0.3.2.log
> Describe your computer, operating system, etc.
> If you want to try to fix the problem yourself, *don't* just cd to
> /usr/local/sage-6.4.1/local/var/tmp/sage/build/pynac-0.3.2 and type 'make'
> or whatever is appropriate.
> Instead, the following commands setup all environment variables
> correctly and load a subshell for you to debug the error:
>   (cd '/usr/local/sage-6.4.1/local/var/tmp/sage/build/pynac-0.3.2' &&
> '/usr/local/sage-6.4.1/sage' --sh)
> When you are done debugging, you can type "exit" to leave the subshell.
> ************************************************************************
> make[2]: ***
> [/usr/local/sage-6.4.1/local/var/lib/sage/installed/pynac-0.3.2] Error 1
> make[2]: Leaving directory `/usr/local/sage-6.4.1/build'
> make[1]: *** [all] Error 2
> make[1]: Leaving directory `/usr/local/sage-6.4.1/build'
>
> real 85m17.075s
> user 77m22.674s
> sys 11m51.313s
> ***************************************************************
> Error building Sage.
>
> The following package(s) may have failed to build:
>
> package: pynac-0.3.2
> log file: /usr/local/sage-6.4.1/logs/pkgs/pynac-0.3.2.log
> build directory: /usr/local/sage-6.4.1/local/var/tmp/sage/build/pynac-0.3.2
>
> The build directory may contain configuration files and other potentially
> helpful information. WARNING: if you now run 'make' again, the build
> directory will, by default, be deleted. Set the environment variable
> SAGE_KEEP_BUILT_SPKGS to 'yes' to prevent this.
>
> make: *** [build] Error 1
> ===============================================
>
> I hope it is NOT a problem as before!! :(
>
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